900209445 has 32 divisors (see below), whose sum is σ = 1530299520. Its totient is φ = 451019520.

The previous prime is 900209441. The next prime is 900209459. The reversal of 900209445 is 544902009.

It is not a de Polignac number, because 900209445 - 2² = 900209441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (900209441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11871 + ... + 44060.

It is an arithmetic number, because the mean of its divisors is an integer number (47821860).

Almost surely, 2^900209445 is an apocalyptic number.

It is an amenable number.

900209445 is a deficient number, since it is larger than the sum of its proper divisors (630090075).

900209445 is a wasteful number, since it uses less digits than its factorization.

900209445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56005.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 900209445 is about 30003.4905469347. The cubic root of 900209445 is about 965.5642739537.

The spelling of 900209445 in words is "nine hundred million, two hundred nine thousand, four hundred forty-five".